Strap for Big Crown ProPilot Big Date Stainless Steel / Black / Green Textile

The lug width of this model is 20 mm. This measurement refers to the internal width between the spring bars where the strap attaches. It is a specific construction dimension not found on mainstream watches, making it essential to verify that any aftermarket strap is compatible with this exact specification.

The choice depends on intended use. Vegetable-tanned alligator in cognac brown represents the most refined option, cohesive with historical pilot watch traditions. Polished black calf leather is the versatile urban solution. For actual aeronautical use, a fabric NATO ensures security—the watch remains on your wrist even if one end detaches.

Use a spring bar tool to compress the spring bars from the inside. Lift the bar gently until it releases. Repeat for the opposite side. Insert the new strap by aligning the holes at both ends, then recompress the bars until they lock. Verify secure installation before wearing.

Yes. milanostraps.it offers a curated selection of 20 mm straps in alligator, calf, NATO, and rubber. Each option is constructed with lugs conforming to this model's specific dimensions. Verification of compatibility before purchase is essential to avoid misfits.

A quality leather strap (alligator or calf) typically lasts 3–5 years under daily-wear conditions, depending on exposure to perspiration, humidity, and UV radiation. Proper maintenance—periodic cleaning with a damp cloth, treatment with specialised balms—extends longevity. Fabric NATO straps endure longer under mechanical stress.